Can UV Weathering Test Machine Test PE Film Without Damaging Them?

PE film is widely used in packaging, agriculture, construction, and protective applications-but it is also highly sensitive to ultraviolet light. A common concern for manufacturers is: "Can a UV weathering test machine evaluate PE film aging without destroying the samples?"

The answer is YES-when the machine uses controlled irradiance, temperature, and cycling that follow international standards such as ASTM G154, ASTM G155, ISO 4892-2, and ISO 4892-3. These standards simulate real UV aging while ensuring samples remain testable instead of immediately damaged.

LIB's UV Weathering Test Machine provides this balance. It reproduces sunlight UV, temperature, humidity, and spray cycles in a stable, programmable, and repeatable environment. Let's explore how it safely evaluates PE film durability, cracking resistance, color stability, and long-term aging performance.

UV weathering machines are used to determine how PE film reacts to controlled ultraviolet exposure over time.
The key point is: PE film can be tested without being physically destroyed-as long as irradiance (0.15–5 W/m² at 340 nm), black panel temperature (40–90 °C), and spray cycles follow standard requirements.

LIB UV Weathering Test Machine for PE Film provides stable UV exposure using U.S.-made 40 W UVA-340, UVB-313, or UVB-351 lamps. These lamps maintain spectral consistency for 5000 hours, ensuring PE film receives repeatable and uniform ultraviolet energy without excessive thermal damage.

In addition, the chamber's precise control system ensures that PE film is exposed to consistent environmental conditions throughout the entire test cycle. Parameters such as humidity, condensation duration, and spray intervals can be set independently, allowing users to duplicate real-world degradation mechanisms such as gloss loss, surface cracking, and early-stage embrittlement. This controlled repeatability helps engineers compare different formulations or additives with high confidence.

A UV weathering machine simulates how sunlight ages materials by combining ultraviolet radiation, heat, humidity, and water spray.
The core principle is: fluorescent UV lamps recreate UV wavelengths between 300–400 nm, the most damaging range for polymers such as PE.

Model	UV-SI-260
Internal Dimension (mm)	450*1170*500
Overall Dimension (mm)	680*1300*1500
Irradiation Source	Fluorescent UV lamps (8) - 40 W
Temperature Range	Ambient ～ 90 ℃ ±2℃
Black Panel Temperature (BPT)	35 ～ 80 ℃
Humidity Range	≥95% RH
Bandwidth	290 ~ 400nm
Irradiance Control	0.3~20 W/㎡
Distance of Specimen and lamp	50mm
Heating Element	Nichrome heater
Controller	Programmable color LCD touch screen controller
	Ethernet connection, PC Link, USB
Water Supply System	Automatic water supply, Water purification system
Interior Material	SUS304 stainless steel

LIB's UV system adopts the following working principles:

1. Controlled UV Radiation

Using UVA-340, UVB-313, and UVB-351 lamps, the chamber recreates outdoor UV exposure based on standards:

• ASTM G154 (UV Fluorescent Lamps)
• ISO 4892-3 (Fluorescent UV Exposure of Plastics)

Irradiance control (0.15–5 W/m²) is managed using UV-SI-260 radiometer, ensuring PE film does not undergo uncontrolled UV burn-through.

2. Precise Temperature Regulation

Black Panel Temperature (BPT) ranges 40–90 °C ±2 °C, representing the true surface temperature of PE films under UV exposure.

3. Humidity & Spray Simulation

10 spray nozzles (0.8–1.0 ml/80 cm²/h) reproduce dew, rain, and moisture cycles that PE materials face outdoors.

4. Uniform Exposure

Flat sample holders accommodate 52 PE film specimens, guaranteeing every sample receives the same UV light level.

These principles ensure PE films are tested scientifically-not destroyed.

》》》For more technical information and details about our UV Weathering Test Machine, please feel free to email us at info@libtestchamber.com.

PE film aging evaluation follows international standards such as ASTM G154, ISO 4892-3, and GB/T 16422.
The procedure ensures controlled, accurate, and repeatable results.

General Process Overview

A complete PE film UV test follows four elements:
UV exposure → Moisture → Heat → Inspection.
Each element accelerates natural aging without causing sudden thermal or mechanical failure.

Step 1 - Prepare the PE Film Samples

Cut films to 75 mm × 150 mm or standard dimensions.

Install them evenly on the flat aluminum holders.

Ensure samples lie flat and receive equal irradiance.

Step 2 - Set Test Parameters Based on PE Film Grade

Typical PE testing parameters:

These follow: ASTM G154 Cycle 1 / ISO 4892-3 Cycle 1.

Step 3 - Run the UV Exposure Cycle

The PID touch-screen controller allows up to 120 programs with 99 segments each.
During testing, the system automatically manages: UV irradiance, Temperature, Spray cycles, Condensation, Timing, Safety alarms

Step 4 - Moisture / Water Spray Cycle

10 nozzles simulate rainfall or morning dew, accelerating PE film environmental degradation.

Step 5 - Collect Results and Evaluate Aging

Common PE film failure indicators include: Gloss loss, Color change, Crack initiation, Loss of elongation, Surface chalking, Oxidation whitening. Reports can be exported via USB, LAN, or RS232 for quality inspection.

》》》To receive customized solutions and pricing for the UV Weathering Test Machine, please contact us at info@libtestchamber.com.

Q1: How is the UV chamber calibrated?

The UV chamber is calibrated using a nine-point temperature test to ensure the temperature probe meets standard requirements. The irradiance probe relies on factory calibration provided by the manufacturer.

Q2: How long does UV testing simulate one year of real-world exposure?

Under the conditions of ASTM G151 and ISO 4892-1, approximately 17 hours of UV testing is considered equivalent to one year of outdoor exposure for many materials.

Q3: What are the differences between UV and xenon lamps? What are the key distinctions?

UV and xenon lamps differ mainly in light source type and spectral range.

UV lamps use fluorescent UV bulbs (UVA/UVB) with a spectrum focused on 290–400 nm, simulating only the ultraviolet portion of sunlight. They follow standards such as ASTM G154.

Xenon lamps are gas-discharge light sources providing a full spectrum-UV, visible, and IR-to closely replicate natural sunlight. They follow standards such as ASTM G155.

Q4: What are the advantages of LIB UV equipment?

LIB UV chambers offer three main advantages:

Designed and manufactured strictly according to ASTM G154 for reliable and compliant results.

Equipped with US QUVA/B UV lamps that accurately simulate UV exposure and are easy to replace.

Supported by a three-year warranty to ensure long-term stable operation.

Q5: Why are the UV chamber's casters different from Temperature and Humidity chambers? Are they specially designed?

The UV chamber uses standard casters, while the TH chamber is equipped with Forman casters. This difference is based on variations in equipment weight and mobility requirements rather than any special design.

Any customization can be made. LIB offers a 3-year warranty and lifetime service. Any issues that cannot be resolved during the warranty period will be replaced free of charge. 24/7 English-speaking after-sales team. Fast shipping within 7-15 days.

Contact LIB Industry to develop a professional and efficient solution tailored to your specific standards and stringent requirements.